摘要PAGE\*MERGEFORMATII振铃检测及模拟摘挂机摘要随着信息科技的日益发展，智能家居逐渐得到普及，而远程家电控制系统则是智能家居的一个重要组成部分。本系统设计的是由用户通过拨打家里的电话来实现远程控制家用电器。本系统是以AT89S52为控制核心，通过振铃检测来实现模拟摘挂机；通过音芯片ISD4004完成语音的录制和播放，用来提示用户进行密码输入等一系列的操作；通过解码芯片MT8870对DTMF信号进行解码，用按键操作来实现密码输入及对控制对象的选择；通过ZigBee模块组网来实现对具体家用电的控制。并结合具体的软件程序实现了远程家电控制系统。振铃检测及模拟摘挂机部分则是本文的重点。系统通过设计了一个具有整流、滤波、稳压等一系列功能的模拟电路以及相应的软件程序来实现对电话线路中铃流信号的检测和模拟摘挂机。并通过实际测试，最终实现了振铃信号检测及模拟摘挂机的功能。关键词：远程家电控制；模拟摘挂机；MT8870；ISD4004；ZigBeeAbstractAbstractWiththeincreasingdevelopmentofinformationtechnology,smarthomegraduallygainedpopularity,andtheremoteappliancecontrolsystemisthesmarthomeisanimportantcomponent.Thissystemisdesignedbytheuserbycallingyourhomephonetoremotecontrolhomeappliances.ThesystemisbasedAT89S52asthecontrolcenterviatheringdetectiontoachieveanaloghook;throughacompletevoicechipISD4004voicerecordingandplayback,usedtoprompttheuserforthepasswordinputandaseriesofoperations;throughthedecoderchipMT8870DTMFsignalsondecodethepasswordwiththekeyoperationtoachievetheobjectofthecontrolinputandchoice;throughnetworkingZigBeemoduletoachievethespecifichouseholdelectriccontrol.Combinedwithspecificsoftwareprogramstoachievetheremoteappliancecontrolsystem.Ringdetectionandanaloguehookpartisthefocusofthisarticle.Bydesigningasystemwitharectifier,filter,regulatorandaseriesoffunctionalanalogcircuitsandthesoftwareprogramtoachievetheringingsignalonthetelephonelineandtheanalogdetectionhook.Throughtheactualtest,andfinallyrealizetheringingsignaldetectionandsimulationpickhangupfunction.Keywords:remotecontrolofhomeappliances;analoghookandhangup;MT8870;ISD4004;ZigBee目录目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc358365040"摘要PAGEREF_Toc358365040\hIHYPERLINK\l"_Toc358365041"AbstractPAGEREF_Toc358365041\hIIHYPERLINK\l"_Toc358365042"1绪论PAGEREF_Toc358365042\h2HYPERLINK\l"_Toc358365043"1.1设计背景PAGEREF_Toc358365043\h2HYPERLINK\l"_Toc358365044"1.2发展现状PAGEREF_Toc358365044\h2HYPERLINK\l"_Toc358365045"1.3功能及特点PAGEREF_Toc358365045\h2HYPERL